got my eye on these at the moment purely due to the fact I can pick one up relatively cheaply. Just wAnt a gps watch to measure my runs etc. Was using my garmin edge but not ideal as it wont lock on to the satellite at times as need to hold it in my hand. Likewise it's an iPhone + I have and it's a bit big for running with. Anyone got/use one ? My other option was a used garmin 310xt on the bay or similar?